Home / 705,120,762.40-1,057,681,143.60-429,215,840.80

Finding the Fourth Proportional to 705,120,762.40, 1,057,681,143.60 and 429,215,840.80

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Solution

The fourth proportional to 705,120,762.40, 1,057,681,143.60 and 429,215,840.80 is: 643,823,761.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,120,762.40 : 1,057,681,143.60 = 429,215,840.80 : x
  2. Step 2: Convert to fraction form
    705,120,762.40/1,057,681,143.60 = 429,215,840.80/x
  3. Step 3: Cross multiply
    705,120,762.40x = 1,057,681,143.60 × 429,215,840.80
  4. Step 4: Simplify right side
    705,120,762.40x = 453,973,501,348,579,584
  5. Step 5: Solve for x
    x = 453,973,501,348,579,584/705,120,762.40
  6. Step 6: Final answer
    x = 643,823,761.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.